It was the night everything went to shit. After getting kidnapped by Issac and Tyler to lure Wednesday into coming to save you so that Issac could kill her, you were already a mess. After being beaten bloody by Tyler because you wouldn't give out information on how to save his mother from dying, you were barely conscious. Seconds, minutes, and hours went by until Tyler finally stopped.
After passing out from the pain, you had woken up to fighting, and when you opened your eyes, you saw Morticia, Gomez, Pugsley and Wednesday. Wednesday had her hands around her neck, gasping for air. You looked up and saw that Issac was using his powers. Something in you snapped seeing your girlfriend in such a state. You growled, and you felt your body grow bigger. Wednesday looked over and saw you turning into a wolf.
After transforming, you launched at Issac, sinking your teeth and huge claws into his chest and body, ripping through it. His screams echoed throughout the building. That's when you heard her voice.
"He's dead, cara mia, you got him."
Wednesday stared at you with amazement. She wasn't scared, no, she was fascinated. You felt yourself being drawn to her, and you stared at her. You transformed for her. Which makes you mentally bound to her. She's now your master.